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2023 Form IL-1120Illinois Department of Revenue-2026
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- Click ‘Get Form’ to open the 2023 Form IL-1120 in our editor.
- Begin by entering your EIN and NAICS Code at the top of the form. Ensure that all contact information is accurate, including the name, title, email address, and mailing address.
- In the Return Information section, check any applicable boxes such as 'Final Alaska return' or 'Amended return' to indicate the nature of your submission.
- Proceed to Schedule A – Net Income Tax Summary. Fill in your Alaska income from Schedule F and any net operating loss utilized. Calculate your taxable income by adding these figures.
- Complete Schedule B by listing all corporations with nexus in Alaska if filing a consolidated return. Ensure accuracy to avoid penalties.
- Continue through each schedule (C through K) as applicable, ensuring you enter all required figures accurately based on your business activities.
- Finally, review your entries for completeness and accuracy before saving or exporting the completed form for submission.
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See more 2023 Form IL-1120Illinois Department of Revenue versions
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| Versions | Form popularity | Fillable & printable |
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| 2024 | 4.8 Satisfied (31 Votes) | |
| 2023 | 4.6 Satisfied (54 Votes) | |
| 2022 | 4.8 Satisfied (68 Votes) | |
| 2021 | 4.8 Satisfied (46 Votes) | |
| 2020 | 4.4 Satisfied (124 Votes) | |
| 2019 | 4 Satisfied (55 Votes) | |
| 2019 | 4.4 Satisfied (253 Votes) | |
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| 2018 | 4.3 Satisfied (114 Votes) | |
| 2017 | 4.1 Satisfied (84 Votes) | |
| 2015 | 4.3 Satisfied (234 Votes) |
What is form 1120 in the USA?
Use Form 1120, U.S. Corporation Income Tax Return, to report the income, gains, losses, deductions, credits, and to figure the income tax liability of a corporation.
Where to mail a 2023 Illinois tax return?
Mailing Addresses AreaAddress IL-1040, Illinois Individual Income Tax Return Without Payment PO BOX 19041 SPRINGFIELD IL 62794-9041 With Payment PO BOX 19027 SPRINGFIELD IL 62794-9027 IL-1040-ES, Estimated Income Tax Payments for Individuals ILLINOIS DEPARTMENT OF REVENUE SPRINGFIELD IL 62736-00015 more rows
Where can I get Illinois tax forms?
If you are trying to locate, download, or print state of Illinois tax forms, you can do so on the Illinois Department of Revenue Website.
What is form IL-1120?
Corporation Income and Replacement Tax - IL-1120.
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Related links
The taxpayer files its Form IL-1120 on September 15, 2021. The statutory deadline for issuing a notice of deficiency is October 15, 2024. On October 14Read more
Business Income Tax Forms. Corporation Income and Replacement Tax - IL-1120. Current Year Prior Years. Exempt Organization Income and Replacement Tax - IL-990Read more